Insights into the C–H Bond Activation on NiO Surfaces: The Role of Nickel and Oxygen Vacancies and of Low Valent Dopants on the Reactivity and Energetics

2017 ◽  
Vol 121 (33) ◽  
pp. 17969-17981 ◽  
Author(s):  
Jithin John Varghese ◽  
Samir H. Mushrif
Keyword(s):  
Oxygen Vacancies ◽  
Bond Activation ◽  
Low Valent

Metal-Metal Cooperative Bond Activation by Heterobimetallic Alkyl, Aryl, and Acetylide PtII/CuI Complexes

2020 ◽  
Author(s):  
Shubham Deolka ◽  
Orestes Rivada Wheelaghan ◽  
Sandra Aristizábal ◽  
Robert Fayzullin ◽  
Shrinwantu Pal ◽  
...  
Keyword(s):  
Alkyl Group ◽  
Bond Activation ◽  
Bond Cleavage ◽  
Terminal Alkyne ◽  
Alkyl Aryl ◽  
Metal Metal ◽  
The Stability ◽  
Selective Formation ◽  
Organoplatinum Compounds

We report selective formation of heterobimetallic PtII/CuI complexes that demonstrate how facile bond activation processes can be achieved by altering reactivity of common organoplatinum compounds through their interaction with another metal center. The interaction of the Cu center with Pt center and with a Pt-bound alkyl group increases the stability of PtMe2 towards undesired rollover cyclometalation. The presence of the CuI center also enables facile transmetalation from electron-deficient tetraarylborate [B(ArF)4]- anion and mild C-H bond cleavage of a terminal alkyne, which was not observed in the absence of an electrophilic Cu center. The DFT study indicates that the role of Cu center acts as a binding site for alkyne substrate, while activating its terminal C-H bond.

Balanced performance for β-Ga2O3 solar blind photodetectors: The role of oxygen vacancies

2021 ◽  
Vol 112 ◽  
pp. 110808
Author(s):  
Jiang Wang ◽  
Yuanqiang Xiong ◽  
Lijuan Ye ◽  
Wanjun Li ◽  
Guoping Qin ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Solar Blind

TBAI Catalyzed Electrochemical C-H Bond Activation of 2-arylated-N-methoxyamides for the Synthesis of Phenanthridinones

Synlett ◽  
2021 ◽  
Author(s):  
Kripa Subramanian ◽  
Subhash L. Yedage ◽  
Kashish Sethi ◽  
Bhalchandra M. Bhanage
Keyword(s):  
Electrochemical Method ◽  
Bond Activation ◽  
Supporting Electrolyte ◽  
Bioactive Compound ◽  
Reaction Conditions ◽  
Redox Catalyst ◽  
Synthetic Utility ◽  
One Step ◽  
Constant Potential

An electrochemical method for the synthesis of phenanthridinones via constant potential electrolysis (CPE) mediated by <i>n</i>-Bu<sub>4</sub>NI (TBAI) has been reported. The protocol is metal and oxidant free and proceeds with 100% current efficiency. Here TBAI plays the dual role of the redox catalyst as well as supporting electrolyte. The intramolecular C-H activation proceeds under mild reaction conditions and short reaction time via electrochemically generated amidyl radicals. The reaction has been scaled up to gram level showing its practicability and the synthetic utility and applicability of the protocol has been demonstrated by the direct one-step synthesis of the bioactive compound Phenaglaydon.

Role of oxygen vacancies on ferromagnetism in Fe-doped TiO2 thin films

2007 ◽  
Vol 102 (7) ◽  
pp. 073905 ◽  
Author(s):  
H. J. Meng ◽  
D. L. Hou ◽  
L. Y. Jia ◽  
X. J. Ye ◽  
H. J. Zhou ◽  
...  
Keyword(s):  
Thin Films ◽  
Oxygen Vacancies ◽  
Tio2 Thin Films ◽  
Doped Tio2

Insights into the synergistic role of metal–lattice oxygen site pairs in four-centered C–H bond activation of methane: the case of CuO

2016 ◽  
Vol 6 (11) ◽  
pp. 3984-3996 ◽  
Author(s):  
Jithin John Varghese ◽  
Quang Thang Trinh ◽  
Samir H. Mushrif
Keyword(s):  
Activation Energy ◽  
Copper Oxide ◽  
Bond Activation ◽  
Lattice Oxygen ◽  
Oxide Surfaces ◽  
Energy Barriers ◽  
Metal Lattice ◽  
Oxygen Site ◽  
Site Pair

Of the three mechanisms for activation of methane on copper and copper oxide surfaces, the under-coordinated Cu–O site pair mediated mechanism on CuO surfaces has the lowest activation energy barriers.

ChemInform Abstract: C-C Bond Formation via C-H Bond Activation under Protic Conditions: The Role of Phosphane Ligand and Cosolvent.

ChemInform ◽  
2010 ◽  
Vol 41 (18) ◽  
Author(s):  
Marc-Olivier Simon ◽  
Remi Martinez ◽  
Jean-Pierre Genet ◽  
Sylvain Darses
Keyword(s):  
Bond Activation ◽  
Bond Formation

Role of oxygen vacancies for resistive switching in noble metal sandwiched Pr0.67Ca0.33MnO3-δ

2017 ◽  
Vol 110 (24) ◽  
pp. 243502 ◽  
Author(s):  
Thilo Kramer ◽  
Malte Scherff ◽  
Daniel Mierwaldt ◽  
Joerg Hoffmann ◽  
Christian Jooss
Keyword(s):  
Noble Metal ◽  
Resistive Switching ◽  
Oxygen Vacancies
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